Frost Dates for 43402 — Bowling Green, Ohio

Half of springs at Bowling Green Wwtp, OH see their last 32°F night by April 22; only one in ten is past it by April 8, and one in ten still has one after May 7. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 2 20%, and after May 7 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 77% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 25 in half of years, as early as October 12 one year in ten, and holds off past November 8 one year in ten. A hard freeze of 28°F follows 11 days later, around November 5; in spring the one-in-ten date for 28°F is April 25, 12 days before the 32°F one. The freeze-free season lasts 186 days in a typical year, longer than at 71% of the 148 Ohio stations; it reaches 205 days one year in ten and falls short of 166 one year in ten. On average 127 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 9 days longer, to about May 1, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 8 and March 10.

July is the warmest month at Bowling Green Wwtp, OH, averaging 84°F by day and 64°F at night; January is the coldest at 33°F and 19°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 23% of years.

Warmth for growing adds up to 3,188 growing degree days a year (base 50°F), fewer than at 56% of the 148 Ohio stations. 34% of them (1,092) have built up by the end of June, and July adds the most, 744. Precipitation totals 35.2 inches a year, most in May (4.0") and least in February (2.0"); May to September bring 51% of it.

The nearest other station, Hoytville 2 NE, OH, 13 miles southwest of Bowling Green, has a last frost 2 days later (April 24), a first frost 4 days earlier (October 21), a season 7 days shorter.

The first measurable snow (0.1 inch or more) in Bowling Green usually arrives around December 6, and the last of the season around March 11. Those are the middle dates across the winters of 1991–2020 at Bowling Green Wwtp, OH, 2.5 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 42 days after the last snow.

ZIP 43402 is 3 miles from Bowling Green Wwtp, OH, which stands at 675 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 43402 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.